powers on to white screen only

jgraffis

New member
I'm working on this p.o.s 820-2523-b

The machine powers on to a white screen only
reset smc
reset pram
checked the 1.05v power rail
still no change

kinda lost, any suggestions?
 

jgraffis

New member
Update on this machine. After replacing the broken c9002 i got it to boot and display flashing folder 1 time. After a shut down and restart, back to the same white screen no image. This morning i powered it on and got the boot menu and booted to asd 3s132 before i ran the test it failed for mux switching. . question is- Is there anything else that would cause this issue besides a failed gpu? also i fails for cpu 0 vcore, thermal interface, ethernet controller, and cpu diode unable to read sensor.
 
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